Edward sciiexck



' E. SOHENGK.

DRAFT EQUALIZER.

Patented Jan. 22, 1889.

Fig. 1

PI I |Il|| *Illtn (No Model.)

N. PETERS, Phulo-Uihogmbhnr, Wishinglon,

Win/asses;

UNITED STATES ATENT rricn.

EDlVARD SOIIENCK, OF COLUMBUS, OIlTO, ASSIGNOR TO THE LECIINER MANUFAOTURING COMPANY, OF SAME PLACE.

DRAFT EQUALIZEH.

SPECIFICATION forming part of Letters Patent No. 396,609, dated January 22, 1889.

Application filed October 12, 1886.

T0 aZZ whom it away concern:

Be it known that T, EDWARD SCHENCK, a citizen of the United States, residing at (o lumbus, in the county of Franklin and State of Ohio, have invented'certain new and use t'ul Improvements in Draft- Equalizers, of which the following is a specification, reference being had therein to the accompanying drawings.

Figure 1 is a plan view of my invention. Fig. 2 is an edge view looking in the direction of the arrow 1, Fig. 1. Fig-:3 a detached enlarged view, in perspective, of one of the elbow-levers. Fig. 4 an edge view of Fig. 3, looking in the direction of the arrow, Fig. 3, and having a section of the cross-bar added thereto.

The object of my invention is to equalize the draft of a horse or other draft-animal upon the thills or shafts of a vehicle without the employment of an ordinary long whittletree pivoted centrally to the cross-bar which connects the rear ends of the thills; and to this end it consists -in certain details of construction and arrangement, which. will be hereinafter explained.

Like letters indicate like parts in all the figures.

A A are the thills, and B the cross-bar, which parts may be of any usual orprelerred construction.

By preference the rear ends of the thills are provided with members of coupling devices, by which they may be attached to the axle.

C D are elhow levers or bent levers pivoted at b b to the crossbar.

The outer ends, I) l), of these lovers are provided with T-piecos to .t'acilitate properly connecting the tugs with the levers, substantially as is ci'istomary in this class of whittletrees. At the inner end of each lever there is a downwardly-proj ectin lug or Stu d, o provided with a hook-shaped spur arranged in a plane parallel to the under surface of the lever and at some distance therefrom, the body of the lever having also asimilarhook-shaped spur, 0. (See particularly Figs. 3 and 4-.)

C is a hub or boss proj eeting from the lower face of the part C of the bent lever, there be erial No. 218,018. (No model.)

ing a hole through the hub and the corresponding part of the lever to receive a bolt, 7,).

E is a cross-ha r provided at either end with a pivot-piece, e e, at right angles to the body of the bar and adapted to engage with the outer faces of the lugs. The length. of the bar E such that by preference, when the parts are in proper position, as indicated in Fig. 1, both levers shall lie at an. angle to the cross-bar with their outer ends projecting in front of the pivots b b, so that with. traces or tugs of equal length the forward pull upon the pivots shall be about the same for both of them.

From the above description it will be readily understood that any excess of pull or mo tion at the outer end of one of the levers will be immediately transferred through the bar E to the opposite lever, as customary in this class of whiffletrees.

By means of the girts (.Z. d the pull upon the outer ends of the levers is transferred al most directly to their ends (1 C in close proxim'ity to the bar 1), whereby the strength and durahilityot' the levers are greatly increased, without a correspondin addition to their weight. After the pivots c chave been placed in working position to the levers the outer ends of the lugs c c are bent around the pivots, thus forming eyes or pivot-seats.

By an examination of Fig. 1, in which one of the spurs c is broken :nvay, it will be readily understood that when one of the lovers is moved into position indicated in dotted lines the shoulder c will engage with the bar E and spring the bar out; into the curved form indicated by dotted lines :1, whereby the elasticity of the bar is utilized to equalize the pull of the horse.

It will also be umlerstood that by reason of the throats in which the ends of the bar E lie and of the lower ends of the pivot-pieces e e lyingbelow the plane of the parts I) D of the lever to which the tugs are attached, and nearly down to the plane of the crossbar, above which the pivot-ljmlts Z) Z) project, the strain upon these bolts is exerted at a point much nearer to the cross-bar in which they are mounted than would be the case if the threats of the levers were in line with the ends of the parts I) D, which parts are necessarily arranged at some distance above the upper surface of the cross-bar to permit the tugs to travel backward and forward above the bar, the hollow hub C resting upon the cross-bar and supporting the body of the lever at a suitable height.

I am aware that elbow levers and bars or links connecting them have been pivoted at their angles to the cross-bars of shafts, and hence do not claim such construction broadly.

Vhat I claim is 1. In combination with the shafts and the cross-bars, the levers provided with the downwardly-projecting hollow hubs, and with the throats below the parts 0 C, and the bar E, provided with the cross-pivots mounted in the throats, substantially as set forth.

2. In combination with the shafts and the cross-bars, the levers provided With the downwardly-projecting hollow hubs O, with the throats below the parts 0 O, and with the shoulders c c, and the elastic bar pivoted in the throats, substantially as set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

- EDWVARD SCHENGK.

lVitnesses:

H. L. SHEPHERD, O. R. GILMORE. 

